- 根目录:
- net
- dsa
- slave.c
/*
* net/dsa/slave.c - Slave device handling
* Copyright (c) 2008-2009 Marvell Semiconductor
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/list.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/of_net.h>
#include <linux/of_mdio.h>
#include <net/rtnetlink.h>
#include <net/switchdev.h>
#include <linux/if_bridge.h>
#include <linux/netpoll.h>
#include "dsa_priv.h"
/* slave mii_bus handling ***************************************************/
static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
{
struct dsa_switch *ds = bus->priv;
if (ds->phys_mii_mask & (1 << addr))
return ds->drv->phy_read(ds, addr, reg);
return 0xffff;
}
static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
{
struct dsa_switch *ds = bus->priv;
if (ds->phys_mii_mask & (1 << addr))
return ds->drv->phy_write(ds, addr, reg, val);
return 0;
}
void dsa_slave_mii_bus_init(struct dsa_switch *ds)
{
ds->slave_mii_bus->priv = (void *)ds;
ds->slave_mii_bus->name = "dsa slave smi";
ds->slave_mii_bus->read = dsa_slave_phy_read;
ds->slave_mii_bus->write = dsa_slave_phy_write;
snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
ds->index, ds->pd->sw_addr);
ds->slave_mii_bus->parent = ds->master_dev;
ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
}
/* slave device handling ****************************************************/
static int dsa_slave_get_iflink(const struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
return p->parent->dst->master_netdev->ifindex;
}
static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
{
return !!p->bridge_dev;
}
static int dsa_slave_open(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct net_device *master = p->parent->dst->master_netdev;
struct dsa_switch *ds = p->parent;
u8 stp_state = dsa_port_is_bridged(p) ?
BR_STATE_BLOCKING : BR_STATE_FORWARDING;
int err;
if (!(master->flags & IFF_UP))
return -ENETDOWN;
if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
err = dev_uc_add(master, dev->dev_addr);
if (err < 0)
goto out;
}
if (dev->flags & IFF_ALLMULTI) {
err = dev_set_allmulti(master, 1);
if (err < 0)
goto del_unicast;
}
if (dev->flags & IFF_PROMISC) {
err = dev_set_promiscuity(master, 1);
if (err < 0)
goto clear_allmulti;
}
if (ds->drv->port_enable) {
err = ds->drv->port_enable(ds, p->port, p->phy);
if (err)
goto clear_promisc;
}
if (ds->drv->port_stp_update)
ds->drv->port_stp_update(ds, p->port, stp_state);
if (p->phy)
phy_start(p->phy);
return 0;
clear_promisc:
if (dev->flags & IFF_PROMISC)
dev_set_promiscuity(master, -1);
clear_allmulti:
if (dev->flags & IFF_ALLMULTI)
dev_set_allmulti(master, -1);
del_unicast:
if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
dev_uc_del(master, dev->dev_addr);
out:
return err;
}
static int dsa_slave_close(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct net_device *master = p->parent->dst->master_netdev;
struct dsa_switch *ds = p->parent;
if (p->phy)
phy_stop(p->phy);
dev_mc_unsync(master, dev);
dev_uc_unsync(master, dev);
if (dev->flags & IFF_ALLMULTI)
dev_set_allmulti(master, -1);
if (dev->flags & IFF_PROMISC)
dev_set_promiscuity(master, -1);
if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
dev_uc_del(master, dev->dev_addr);
if (ds->drv->port_disable)
ds->drv->port_disable(ds, p->port, p->phy);
if (ds->drv->port_stp_update)
ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
return 0;
}
static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct net_device *master = p->parent->dst->master_netdev;
if (change & IFF_ALLMULTI)
dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
if (change & IFF_PROMISC)
dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
}
static void dsa_slave_set_rx_mode(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct net_device *master = p->parent->dst->master_netdev;
dev_mc_sync(master, dev);
dev_uc_sync(master, dev);
}
static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct net_device *master = p->parent->dst->master_netdev;
struct sockaddr *addr = a;
int err;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
if (!(dev->flags & IFF_UP))
goto out;
if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
err = dev_uc_add(master, addr->sa_data);
if (err < 0)
return err;
}
if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
dev_uc_del(master, dev->dev_addr);
out:
ether_addr_copy(dev->dev_addr, addr->sa_data);
return 0;
}
static int dsa_bridge_check_vlan_range(struct dsa_switch *ds,
const struct net_device *bridge,
u16 vid_begin, u16 vid_end)
{
struct dsa_slave_priv *p;
struct net_device *dev, *vlan_br;
DECLARE_BITMAP(members, DSA_MAX_PORTS);
DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
u16 vid;
int member, err;
if (!ds->drv->vlan_getnext || !vid_begin)
return -EOPNOTSUPP;
vid = vid_begin - 1;
do {
err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
if (err)
break;
if (vid > vid_end)
break;
member = find_first_bit(members, DSA_MAX_PORTS);
if (member == DSA_MAX_PORTS)
continue;
dev = ds->ports[member];
p = netdev_priv(dev);
vlan_br = p->bridge_dev;
if (vlan_br == bridge)
continue;
netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid);
return -EOPNOTSUPP;
} while (vid < vid_end);
return err == -ENOENT ? 0 : err;
}
static int dsa_slave_port_vlan_add(struct net_device *dev,
const struct switchdev_obj_port_vlan *vlan,
struct switchdev_trans *trans)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int err;
if (switchdev_trans_ph_prepare(trans)) {
if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add)
return -EOPNOTSUPP;
/* If the requested port doesn't belong to the same bridge as
* the VLAN members, fallback to software VLAN (hopefully).
*/
err = dsa_bridge_check_vlan_range(ds, p->bridge_dev,
vlan->vid_begin,
vlan->vid_end);
if (err)
return err;
err = ds->drv->port_vlan_prepare(ds, p->port, vlan, trans);
if (err)
return err;
} else {
err = ds->drv->port_vlan_add(ds, p->port, vlan, trans);
if (err)
return err;
}
return 0;
}
static int dsa_slave_port_vlan_del(struct net_device *dev,
const struct switchdev_obj_port_vlan *vlan)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (!ds->drv->port_vlan_del)
return -EOPNOTSUPP;
return ds->drv->port_vlan_del(ds, p->port, vlan);
}
static int dsa_slave_port_vlan_dump(struct net_device *dev,
struct switchdev_obj_port_vlan *vlan,
switchdev_obj_dump_cb_t *cb)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
DECLARE_BITMAP(members, DSA_MAX_PORTS);
DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
u16 pvid, vid = 0;
int err;
if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
return -EOPNOTSUPP;
err = ds->drv->port_pvid_get(ds, p->port, &pvid);
if (err)
return err;
for (;;) {
err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
if (err)
break;
if (!test_bit(p->port, members))
continue;
memset(vlan, 0, sizeof(*vlan));
vlan->vid_begin = vlan->vid_end = vid;
if (vid == pvid)
vlan->flags |= BRIDGE_VLAN_INFO_PVID;
if (test_bit(p->port, untagged))
vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
err = cb(&vlan->obj);
if (err)
break;
}
return err == -ENOENT ? 0 : err;
}
static int dsa_slave_port_fdb_add(struct net_device *dev,
const struct switchdev_obj_port_fdb *fdb,
struct switchdev_trans *trans)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret;
if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
return -EOPNOTSUPP;
if (switchdev_trans_ph_prepare(trans))
ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
else
ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans);
return ret;
}
static int dsa_slave_port_fdb_del(struct net_device *dev,
const struct switchdev_obj_port_fdb *fdb)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret = -EOPNOTSUPP;
if (ds->drv->port_fdb_del)
ret = ds->drv->port_fdb_del(ds, p->port, fdb);
return ret;
}
static int dsa_slave_port_fdb_dump(struct net_device *dev,
struct switchdev_obj_port_fdb *fdb,
switchdev_obj_dump_cb_t *cb)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (ds->drv->port_fdb_dump)
return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
return -EOPNOTSUPP;
}
static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct dsa_slave_priv *p = netdev_priv(dev);
if (p->phy != NULL)
return phy_mii_ioctl(p->phy, ifr, cmd);
return -EOPNOTSUPP;
}
/* Return a bitmask of all ports being currently bridged within a given bridge
* device. Note that on leave, the mask will still return the bitmask of ports
* currently bridged, prior to port removal, and this is exactly what we want.
*/
static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
struct net_device *bridge)
{
struct dsa_slave_priv *p;
unsigned int port;
u32 mask = 0;
for (port = 0; port < DSA_MAX_PORTS; port++) {
if (!dsa_is_port_initialized(ds, port))
continue;
p = netdev_priv(ds->ports[port]);
if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
p->bridge_dev == bridge)
mask |= 1 << port;
}
return mask;
}
static int dsa_slave_stp_update(struct net_device *dev, u8 state)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret = -EOPNOTSUPP;
if (ds->drv->port_stp_update)
ret = ds->drv->port_stp_update(ds, p->port, state);
return ret;
}
static int dsa_slave_port_attr_set(struct net_device *dev,
const struct switchdev_attr *attr,
struct switchdev_trans *trans)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret;
switch (attr->id) {
case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
if (switchdev_trans_ph_prepare(trans))
ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
else
ret = ds->drv->port_stp_update(ds, p->port,
attr->u.stp_state);
break;
default:
ret = -EOPNOTSUPP;
break;
}
return ret;
}
static int dsa_slave_port_obj_add(struct net_device *dev,
const struct switchdev_obj *obj,
struct switchdev_trans *trans)
{
int err;
/* For the prepare phase, ensure the full set of changes is feasable in
* one go in order to signal a failure properly. If an operation is not
* supported, return -EOPNOTSUPP.
*/
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_FDB:
err = dsa_slave_port_fdb_add(dev,
SWITCHDEV_OBJ_PORT_FDB(obj),
trans);
break;
case SWITCHDEV_OBJ_ID_PORT_VLAN:
err = dsa_slave_port_vlan_add(dev,
SWITCHDEV_OBJ_PORT_VLAN(obj),
trans);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int dsa_slave_port_obj_del(struct net_device *dev,
const struct switchdev_obj *obj)
{
int err;
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_FDB:
err = dsa_slave_port_fdb_del(dev,
SWITCHDEV_OBJ_PORT_FDB(obj));
break;
case SWITCHDEV_OBJ_ID_PORT_VLAN:
err = dsa_slave_port_vlan_del(dev,
SWITCHDEV_OBJ_PORT_VLAN(obj));
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int dsa_slave_port_obj_dump(struct net_device *dev,
struct switchdev_obj *obj,
switchdev_obj_dump_cb_t *cb)
{
int err;
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_FDB:
err = dsa_slave_port_fdb_dump(dev,
SWITCHDEV_OBJ_PORT_FDB(obj),
cb);
break;
case SWITCHDEV_OBJ_ID_PORT_VLAN:
err = dsa_slave_port_vlan_dump(dev,
SWITCHDEV_OBJ_PORT_VLAN(obj),
cb);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int dsa_slave_bridge_port_join(struct net_device *dev,
struct net_device *br)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret = -EOPNOTSUPP;
p->bridge_dev = br;
if (ds->drv->port_join_bridge)
ret = ds->drv->port_join_bridge(ds, p->port,
dsa_slave_br_port_mask(ds, br));
return ret;
}
static int dsa_slave_bridge_port_leave(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret = -EOPNOTSUPP;
if (ds->drv->port_leave_bridge)
ret = ds->drv->port_leave_bridge(ds, p->port,
dsa_slave_br_port_mask(ds, p->bridge_dev));
p->bridge_dev = NULL;
/* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
* so allow it to be in BR_STATE_FORWARDING to be kept functional
*/
dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
return ret;
}
static int dsa_slave_port_attr_get(struct net_device *dev,
struct switchdev_attr *attr)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
switch (attr->id) {
case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
attr->u.ppid.id_len = sizeof(ds->index);
memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
struct sk_buff *skb)
{
#ifdef CONFIG_NET_POLL_CONTROLLER
if (p->netpoll)
netpoll_send_skb(p->netpoll, skb);
#else
BUG();
#endif
return NETDEV_TX_OK;
}
static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct sk_buff *nskb;
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
/* Transmit function may have to reallocate the original SKB */
nskb = p->xmit(skb, dev);
if (!nskb)
return NETDEV_TX_OK;
/* SKB for netpoll still need to be mangled with the protocol-specific
* tag to be successfully transmitted
*/
if (unlikely(netpoll_tx_running(dev)))
return dsa_netpoll_send_skb(p, nskb);
/* Queue the SKB for transmission on the parent interface, but
* do not modify its EtherType
*/
nskb->dev = p->parent->dst->master_netdev;
dev_queue_xmit(nskb);
return NETDEV_TX_OK;
}
static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
struct net_device *dev)
{
/* Just return the original SKB */
return skb;
}
/* ethtool operations *******************************************************/
static int
dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct dsa_slave_priv *p = netdev_priv(dev);
int err;
err = -EOPNOTSUPP;
if (p->phy != NULL) {
err = phy_read_status(p->phy);
if (err == 0)
err = phy_ethtool_gset(p->phy, cmd);
}
return err;
}
static int
dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct dsa_slave_priv *p = netdev_priv(dev);
if (p->phy != NULL)
return phy_ethtool_sset(p->phy, cmd);
return -EOPNOTSUPP;
}
static void dsa_slave_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *drvinfo)
{
strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
}
static int dsa_slave_get_regs_len(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (ds->drv->get_regs_len)
return ds->drv->get_regs_len(ds, p->port);
return -EOPNOTSUPP;
}
static void
dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (ds->drv->get_regs)
ds->drv->get_regs(ds, p->port, regs, _p);
}
static int dsa_slave_nway_reset(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
if (p->phy != NULL)
return genphy_restart_aneg(p->phy);
return -EOPNOTSUPP;
}
static u32 dsa_slave_get_link(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
if (p->phy != NULL) {
genphy_update_link(p->phy);
return p->phy->link;
}
return -EOPNOTSUPP;
}
static int dsa_slave_get_eeprom_len(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (ds->pd->eeprom_len)
return ds->pd->eeprom_len;
if (ds->drv->get_eeprom_len)
return ds->drv->get_eeprom_len(ds);
return 0;
}
static int dsa_slave_get_eeprom(struct net_device *dev,
struct ethtool_eeprom *eeprom, u8 *data)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (ds->drv->get_eeprom)
return ds->drv->get_eeprom(ds, eeprom, data);
return -EOPNOTSUPP;
}
static int dsa_slave_set_eeprom(struct net_device *dev,
struct ethtool_eeprom *eeprom, u8 *data)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (ds->drv->set_eeprom)
return ds->drv->set_eeprom(ds, eeprom, data);
return -EOPNOTSUPP;
}
static void dsa_slave_get_strings(struct net_device *dev,
uint32_t stringset, uint8_t *data)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (stringset == ETH_SS_STATS) {
int len = ETH_GSTRING_LEN;
strncpy(data, "tx_packets", len);
strncpy(data + len, "tx_bytes", len);
strncpy(data + 2 * len, "rx_packets", len);
strncpy(data + 3 * len, "rx_bytes", len);
if (ds->drv->get_strings != NULL)
ds->drv->get_strings(ds, p->port, data + 4 * len);
}
}
static void dsa_slave_get_ethtool_stats(struct net_device *dev,
struct ethtool_stats *stats,
uint64_t *data)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
data[0] = p->dev->stats.tx_packets;
data[1] = p->dev->stats.tx_bytes;
data[2] = p->dev->stats.rx_packets;
data[3] = p->dev->stats.rx_bytes;
if (ds->drv->get_ethtool_stats != NULL)
ds->drv->get_ethtool_stats(ds, p->port, data + 4);
}
static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (sset == ETH_SS_STATS) {
int count;
count = 4;
if (ds->drv->get_sset_count != NULL)
count += ds->drv->get_sset_count(ds);
return count;
}
return -EOPNOTSUPP;
}
static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (ds->drv->get_wol)
ds->drv->get_wol(ds, p->port, w);
}
static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret = -EOPNOTSUPP;
if (ds->drv->set_wol)
ret = ds->drv->set_wol(ds, p->port, w);
return ret;
}
static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret;
if (!ds->drv->set_eee)
return -EOPNOTSUPP;
ret = ds->drv->set_eee(ds, p->port, p->phy, e);
if (ret)
return ret;
if (p->phy)
ret = phy_ethtool_set_eee(p->phy, e);
return ret;
}
static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret;
if (!ds->drv->get_eee)
return -EOPNOTSUPP;
ret = ds->drv->get_eee(ds, p->port, e);
if (ret)
return ret;
if (p->phy)
ret = phy_ethtool_get_eee(p->phy, e);
return ret;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static int dsa_slave_netpoll_setup(struct net_device *dev,
struct netpoll_info *ni)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
struct net_device *master = ds->dst->master_netdev;
struct netpoll *netpoll;
int err = 0;
netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
if (!netpoll)
return -ENOMEM;
err = __netpoll_setup(netpoll, master);
if (err) {
kfree(netpoll);
goto out;
}
p->netpoll = netpoll;
out:
return err;
}
static void dsa_slave_netpoll_cleanup(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct netpoll *netpoll = p->netpoll;
if (!netpoll)
return;
p->netpoll = NULL;
__netpoll_free_async(netpoll);
}
static void dsa_slave_poll_controller(struct net_device *dev)
{
}
#endif
static const struct ethtool_ops dsa_slave_ethtool_ops = {
.get_settings = dsa_slave_get_settings,
.set_settings = dsa_slave_set_settings,
.get_drvinfo = dsa_slave_get_drvinfo,
.get_regs_len = dsa_slave_get_regs_len,
.get_regs = dsa_slave_get_regs,
.nway_reset = dsa_slave_nway_reset,
.get_link = dsa_slave_get_link,
.get_eeprom_len = dsa_slave_get_eeprom_len,
.get_eeprom = dsa_slave_get_eeprom,
.set_eeprom = dsa_slave_set_eeprom,
.get_strings = dsa_slave_get_strings,
.get_ethtool_stats = dsa_slave_get_ethtool_stats,
.get_sset_count = dsa_slave_get_sset_count,
.set_wol = dsa_slave_set_wol,
.get_wol = dsa_slave_get_wol,
.set_eee = dsa_slave_set_eee,
.get_eee = dsa_slave_get_eee,
};
static const struct net_device_ops dsa_slave_netdev_ops = {
.ndo_open = dsa_slave_open,
.ndo_stop = dsa_slave_close,
.ndo_start_xmit = dsa_slave_xmit,
.ndo_change_rx_flags = dsa_slave_change_rx_flags,
.ndo_set_rx_mode = dsa_slave_set_rx_mode,
.ndo_set_mac_address = dsa_slave_set_mac_address,
.ndo_fdb_add = switchdev_port_fdb_add,
.ndo_fdb_del = switchdev_port_fdb_del,
.ndo_fdb_dump = switchdev_port_fdb_dump,
.ndo_do_ioctl = dsa_slave_ioctl,
.ndo_get_iflink = dsa_slave_get_iflink,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_netpoll_setup = dsa_slave_netpoll_setup,
.ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
.ndo_poll_controller = dsa_slave_poll_controller,
#endif
.ndo_bridge_getlink = switchdev_port_bridge_getlink,
.ndo_bridge_setlink = switchdev_port_bridge_setlink,
.ndo_bridge_dellink = switchdev_port_bridge_dellink,
};
static const struct switchdev_ops dsa_slave_switchdev_ops = {
.switchdev_port_attr_get = dsa_slave_port_attr_get,
.switchdev_port_attr_set = dsa_slave_port_attr_set,
.switchdev_port_obj_add = dsa_slave_port_obj_add,
.switchdev_port_obj_del = dsa_slave_port_obj_del,
.switchdev_port_obj_dump = dsa_slave_port_obj_dump,
};
static struct device_type dsa_type = {
.name = "dsa",
};
static void dsa_slave_adjust_link(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
unsigned int status_changed = 0;
if (p->old_link != p->phy->link) {
status_changed = 1;
p->old_link = p->phy->link;
}
if (p->old_duplex != p->phy->duplex) {
status_changed = 1;
p->old_duplex = p->phy->duplex;
}
if (p->old_pause != p->phy->pause) {
status_changed = 1;
p->old_pause = p->phy->pause;
}
if (ds->drv->adjust_link && status_changed)
ds->drv->adjust_link(ds, p->port, p->phy);
if (status_changed)
phy_print_status(p->phy);
}
static int dsa_slave_fixed_link_update(struct net_device *dev,
struct fixed_phy_status *status)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
if (ds->drv->fixed_link_update)
ds->drv->fixed_link_update(ds, p->port, status);
return 0;
}
/* slave device setup *******************************************************/
static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
struct net_device *slave_dev,
int addr)
{
struct dsa_switch *ds = p->parent;
p->phy = ds->slave_mii_bus->phy_map[addr];
if (!p->phy) {
netdev_err(slave_dev, "no phy at %d\n", addr);
return -ENODEV;
}
/* Use already configured phy mode */
if (p->phy_interface == PHY_INTERFACE_MODE_NA)
p->phy_interface = p->phy->interface;
phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
p->phy_interface);
return 0;
}
static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
struct net_device *slave_dev)
{
struct dsa_switch *ds = p->parent;
struct dsa_chip_data *cd = ds->pd;
struct device_node *phy_dn, *port_dn;
bool phy_is_fixed = false;
u32 phy_flags = 0;
int mode, ret;
port_dn = cd->port_dn[p->port];
mode = of_get_phy_mode(port_dn);
if (mode < 0)
mode = PHY_INTERFACE_MODE_NA;
p->phy_interface = mode;
phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
if (of_phy_is_fixed_link(port_dn)) {
/* In the case of a fixed PHY, the DT node associated
* to the fixed PHY is the Port DT node
*/
ret = of_phy_register_fixed_link(port_dn);
if (ret) {
netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
return ret;
}
phy_is_fixed = true;
phy_dn = port_dn;
}
if (ds->drv->get_phy_flags)
phy_flags = ds->drv->get_phy_flags(ds, p->port);
if (phy_dn) {
int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
/* If this PHY address is part of phys_mii_mask, which means
* that we need to divert reads and writes to/from it, then we
* want to bind this device using the slave MII bus created by
* DSA to make that happen.
*/
if (!phy_is_fixed && phy_id >= 0 &&
(ds->phys_mii_mask & (1 << phy_id))) {
ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
if (ret) {
netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
return ret;
}
} else {
p->phy = of_phy_connect(slave_dev, phy_dn,
dsa_slave_adjust_link,
phy_flags,
p->phy_interface);
}
}
if (p->phy && phy_is_fixed)
fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
/* We could not connect to a designated PHY, so use the switch internal
* MDIO bus instead
*/
if (!p->phy) {
ret = dsa_slave_phy_connect(p, slave_dev, p->port);
if (ret) {
netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
return ret;
}
} else {
netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
p->phy->addr, p->phy->drv->name);
}
return 0;
}
static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock,
&dsa_slave_netdev_xmit_lock_key);
}
int dsa_slave_suspend(struct net_device *slave_dev)
{
struct dsa_slave_priv *p = netdev_priv(slave_dev);
if (p->phy) {
phy_stop(p->phy);
p->old_pause = -1;
p->old_link = -1;
p->old_duplex = -1;
phy_suspend(p->phy);
}
return 0;
}
int dsa_slave_resume(struct net_device *slave_dev)
{
struct dsa_slave_priv *p = netdev_priv(slave_dev);
netif_device_attach(slave_dev);
if (p->phy) {
phy_resume(p->phy);
phy_start(p->phy);
}
return 0;
}
int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
int port, char *name)
{
struct net_device *master = ds->dst->master_netdev;
struct net_device *slave_dev;
struct dsa_slave_priv *p;
int ret;
slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
NET_NAME_UNKNOWN, ether_setup);
if (slave_dev == NULL)
return -ENOMEM;
slave_dev->features = master->vlan_features;
slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
eth_hw_addr_inherit(slave_dev, master);
slave_dev->priv_flags |= IFF_NO_QUEUE;
slave_dev->netdev_ops = &dsa_slave_netdev_ops;
slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
NULL);
SET_NETDEV_DEV(slave_dev, parent);
slave_dev->dev.of_node = ds->pd->port_dn[port];
slave_dev->vlan_features = master->vlan_features;
p = netdev_priv(slave_dev);
p->dev = slave_dev;
p->parent = ds;
p->port = port;
switch (ds->dst->tag_protocol) {
#ifdef CONFIG_NET_DSA_TAG_DSA
case DSA_TAG_PROTO_DSA:
p->xmit = dsa_netdev_ops.xmit;
break;
#endif
#ifdef CONFIG_NET_DSA_TAG_EDSA
case DSA_TAG_PROTO_EDSA:
p->xmit = edsa_netdev_ops.xmit;
break;
#endif
#ifdef CONFIG_NET_DSA_TAG_TRAILER
case DSA_TAG_PROTO_TRAILER:
p->xmit = trailer_netdev_ops.xmit;
break;
#endif
#ifdef CONFIG_NET_DSA_TAG_BRCM
case DSA_TAG_PROTO_BRCM:
p->xmit = brcm_netdev_ops.xmit;
break;
#endif
default:
p->xmit = dsa_slave_notag_xmit;
break;
}
p->old_pause = -1;
p->old_link = -1;
p->old_duplex = -1;
ret = dsa_slave_phy_setup(p, slave_dev);
if (ret) {
netdev_err(master, "error %d setting up slave phy\n", ret);
free_netdev(slave_dev);
return ret;
}
ds->ports[port] = slave_dev;
ret = register_netdev(slave_dev);
if (ret) {
netdev_err(master, "error %d registering interface %s\n",
ret, slave_dev->name);
phy_disconnect(p->phy);
ds->ports[port] = NULL;
free_netdev(slave_dev);
return ret;
}
netif_carrier_off(slave_dev);
return 0;
}
static bool dsa_slave_dev_check(struct net_device *dev)
{
return dev->netdev_ops == &dsa_slave_netdev_ops;
}
static int dsa_slave_master_changed(struct net_device *dev)
{
struct net_device *master = netdev_master_upper_dev_get(dev);
struct dsa_slave_priv *p = netdev_priv(dev);
int err = 0;
if (master && master->rtnl_link_ops &&
!strcmp(master->rtnl_link_ops->kind, "bridge"))
err = dsa_slave_bridge_port_join(dev, master);
else if (dsa_port_is_bridged(p))
err = dsa_slave_bridge_port_leave(dev);
return err;
}
int dsa_slave_netdevice_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev;
int err = 0;
switch (event) {
case NETDEV_CHANGEUPPER:
dev = netdev_notifier_info_to_dev(ptr);
if (!dsa_slave_dev_check(dev))
goto out;
err = dsa_slave_master_changed(dev);
if (err && err != -EOPNOTSUPP)
netdev_warn(dev, "failed to reflect master change\n");
break;
}
out:
return NOTIFY_DONE;
}